BenL wrote:Thanks Matt. Have you done this? From the comments it seems a bit hit and miss and I'm worried about being stuck with something I end up not liking!

Hi Ben

Yes, ive done it.If you dial the field test mode number, the app will open and you will see the numbers displayed.If you then close the app, your phone will revert back to how it was with signal bars.

If you want to keep the numbers(but be able to switch between numbers and bars by touching), simply press the power button until the slide to power off appears. Then release the power button and press and hold the home button until the app exits.

If you want to revert to normal bars, dial the field test mode number again, and exit the app by just using the home button as yu would with any app.